Draft-equalizer



(No Model.)

J. J. H. vPARROTT. DRAFT EQUALIZER.

lie 3,74,620. Batnted Dec. 13, 1887.

M WITNESSES: WWW/W05 ATTORNEY UNITED STATES PATENT OFFICE.

JOHN J. H. PARROTT, OF CHICAGO, ILLINOIS.

DRAFT-EQUALIZER.

SPECIFICATION forming part of Letters Patent No. 374,620, dated December 13, 1887.

v Application filed August 1, 1887. Serial No. 245,891. (No model.)

.To all whom it may concern.- I

Be it known that I, JOHN J. H. PARROTT, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Equalizing Devices for Side- Draft Machines, of which the following, in connection with the accompanying sheet ofdrawings, is a full, complete, and accurate specification.

My invention relates and is applicable to mowing, harvesting, or reaping machines, or to any machine or vehicle whatever to which the application of a side draft becomes necessary.

My invention may be best described by reference to the accompanying sheet of drawings, wherein a top plan of my invention is shown intone figure.

The letters of reference appearing upon said plan indicate the respective parts there illustrated, as follows:

A is the pole or tongue;

B is the draw-bar.

C is the doubltree.

D and E are singletrees attached to doubletree 0. F is a third singletree.

G is a bar extending outward from tongue A, at the outer extremity of which is attached singletree F.

H is a slotted casting attached to tongue A at such position as to receive a guide-bolt passing downward through doubletree O and bar G.

I is a guide-bolt (shown in dotted lines) passingthrough doubletree Oand bar G, and thence into slot in casting H.

K is a rack faced upon draw-bar B.

L is a geared sector made fast to tongue A, the teeth of which engage those of rack K.

M is a rod, one end of which is attached at about the longitudinal center of bar G, and its other end attached to draw-bar B.

N is a rod, one end of which is attached to doubletree O, and its other end attached to draw-bar B. p v.

S and T represent, respectively, the directions indicated by the several points of theindex to which they are appended, and in further describing my invention those parts appearing upon the respective sides of the tongue A will be referred to as appearing upon the side S or side T, as the case may be.

Were my invention, as shown in the accoin which it is the object of my invention to over come. I accomplish this by the mechanism hereinbefore described, the operation of which is as fol-lows:

The draft-power is transmitted from the doubletree C and bar G to the draw-bar B by the crossed rods M and N, that transmitted from doubletree G being received on the side S, and that transmitted from bar G being received on side T. The power is. given by the draw-bar B to the tongue A by the bearing of the rack K against the geared sector L.

While the teeth on the sides S of therack and sector are engaged, as shown in the drawing, the tendency of such application of power would be to force the tongue straight ahead; but were the third horse, being harnessed to singletree F, to forge ahead of his mates, the

bar G,being thereby brought forward, would,

by means of rod M, also bring forward side T of bar B, thus causing the point of contact between the rack K and sector L to shift from the position shown in drawing toward the side T in proportion to the distance that the third horse forges ahead of his mates, and the point of contact being changed to the side T the application of power at this place tends to throw the extremity of tongue A outward toward side S, rather than inward toward side T, thus relieving, rather than oppressing,the horse on side T, and also bringing the application of power nearer to the point of expenditure, and thus more nearly approximating a direct draft.

Having thus described the structure, operation, and purpose of my invention, I reserve the right to modify the construction thereof draw-bar B, rack K, sector L, and rods M and by the substitution of straps, chains, or'other N, all arranged substantially as and for the connections in place of rods M and N, and to purposes in this specification set forth,shown,

substitute a system of pins and channels for and described. I 5 the teeth on rack K and sector L. In witness whereof I have hereunto afiixed I claim as my inventionmy signature this 22d day of July, 1887. 1. The combination of draw-bar 13, rack K,

sector L, rods M and N, and tongue Awith dou- JOHN PARROTT' bio and single tree's, substantially as specified. \Vitnesses: 1o 2. In a vehicle or machine to be drawn by GEO. NICHOLS,

horses or other animals, the combination of V. KNOX HAYNES. 

